Ikoymarrwa isn’t on any map. It is a small water hole that rangers are concerned could damaged if large crowds started to descend on it. It is down a very short but rocky 4WD track. The water there is freezing. It is best for those in a 2WD who want to find a place to swim. Just leave your car on the road. The rangers will generally give you directions if you ask, as will most tourist stops like caravan parks.